Rimming machine



A. B. WILSCN ETAL May 26, 1942.

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23/ A//en l/l//Asolz 22:9 Fh/wm @Swanyren Patented May 26, 1942 RIMMING MACHINE Allen B. Wilson, Evanston, and Edwin V. Swangren, Maywood, Ill., assignors to Kimberly Stuart, Menasha, Wis.

Application September 1, 1938, Serial No. 228,028

Claims. This invention relates to an apparatus for making containers, and more particularly to apparatus for making containers of the type which are constructed with reinforced edge portions.

The use of containers madev of paper, pulp board, fibrous sheet material or the like for the sale of food products orA the like has become commonpractice. Since containers made of these materials are usuallyeasily bendable, ordinarily it has become desirable to reinforce them to resist distortion and prevent consequent injury to the product in the container. reinforcing these containers which has heretofore been proposed is to fasten a strip of some fairly rigid but bendable material-such as metal along the peripheral edge of the container after it has been formed into the desired shape. In

the copending application of Garrett B. Linderman, Jr., Serial No. 150,447, filed June 26,Y 1937 (Patent 2,125,793, granted Aug. 2, 1938) there is disclosed the use of a strip of metal as a stiffening rim along the peripheral edge of a paper pie plate or similar utensil.

lThe present invention relates generally to improvements and refinements in the apparatus disclosed in the aforementioned application. In commercial production of reinforced paper utensils, it is desirable to speed up production and cut down material costs as much as possible with- One manner of (c1. a-1)v metal rim to a container of paper, other brous material, or the like. e

It is a further object of the invention to provide a novel apparatus for making a. reenforced i5- container from a sheet of paper or similar material, wherein the material is formed to shape and supplied with a reenforcing rim in automatically progressive operations.

- Further objects of the invention will presently l0 appear as the description of the invention proceeds in connection with the appended claims and the annexed drawings in which:

' Figure 1 is a side elevation of a complete plate rimming machine constructed according to the l5 principles of my invention;

curling shoe assembly;

Figure 2B is a sectional view taken on the line lZKB-2B of Figure 2A;

Figure 2C is ya fragmental view of the front of the machine and shows the curling shoe and roll assembly;

Figure 3 is a rear elevation of part of the machine of Figure 1 illustrating especially the drive and cam arrangements;

Figure 4 is a side elevation of part of the maout sacrificing the distortion resisting qualities of Chine 0f Figure 1 partly in Section and illustrating the utensil.

Accordingly, it is a major object of the present invention to provide novel apparatus for speedily and positively fastening stiffening or reinforcing members to portions of light weight containers or utensils made of paper or similar materials, and to devise a novel container having a reenforced edge portion.

It is a further object of the invention to proespecially the cam operated chuck control linkageA and the latch control mechanism;

Figure 5 is a top plan View of part of the machine of Figure 4 illustrating especially the strip pre-bending rollers;

vide novel apparatus for applying stiffening rims 40 arrangement;

of metal or other'suitable material to the peripheral edges of pie plates or similar containers.

A further object is to provide novel apparatus for securing a reinforcing member about the peripheral edge of a container of paper or the like, and wherein the container and reinforcing member are synchronously fed to progressively present the edge of the container in cooperative relation Figure 8 is a transverse sectional viewvof one form of pre-bent strip before entering the forming rollers;

IFigure 9 is a diagrammatic view on a large scale illustrating the action of the forming rollers or dies upon the rim strip of Figure 8;

Figure 10 is a diagrammatic view on a large scale illustrating the action of the curling 'or' crimping rollers in clamping the strip upon the with the member along its length. Preferably y paper plat-e;

the apparatus is adjustable to permit operation upon containers of differentl size.

A further object of the invention is to provide novel cooperating rollers and/or dies or similar Figure 10A is a plan view of a platewith the reenforcing strip attached, illustrating the overlapped interlocking joint;

. Figure 11v is a side elevation illustrating a preforming devices for Shaping and applying a sheet ferred form of curling or crimping rollers;

Figure 12 is a side elevation illustrating a modified arrangement of curling or crimping rollers which may be used instead of the rollers of Figure 11;

Figure 13 is an enlarged side view of the-rocker arm arrangement for permitting separation of the curling or crimping rollers;

Figure 14 is a side elevation of a rigid die which may be substituted for the die rollers of Figure 9;

Figure 15 is a transverse section along line I--I5 of Figure 14; p

Figure 16 is a transverse section along line I6-I6 of Figure 14;

Figure 17 is a transverse section along line I1-I1 of Figure 14;

Figure 18 illustrates a modied latch which may be used with the one way clutch of Figures 6 and 7;

Figure 19 is a side elevational view, partly diagrammatic, of chuck and roller arrangements in a modification of the invention in which the utensil or paper plate is formed to shape and then rimmed without being removed from the chuck. 'I'his view shows the sheet material inserted between the plates in readiness for the plate forming operation with the rim bending rollers withdrawn; and

Figure 20 is a side view partly in section of the parts of Figure 19 after the plate has been formed and the rim bending rollers advanced to operative position with respect to the formed plate.

Referring to Figures4 1-3 the plate rimming machine of our invention is mounted upon a base II rising from-a pedestal I2 which may be bolted or otherwise secured 'to Athe floor or a similar support. A relatively wide platform I3 is preferably formed integral with the top portion of base II and is formed with guide surfaces I4 for slidably supporting an adjustable head' I5. Head I5 is provided wth laterally extending feet I6 which are preferably machined or otherwise formed to cooperate with guide surfaces I4. A pair of laterally extending plates I1 are secured longitudinally along each side of platform I3 and plates I1 extend laterally over the upper edges of feet I6 to form part of the guideway for feet I6 and prevent head I5 from being displaced vertically from the guideway.

Head I5 is formed with a downwardly extending lug I8 which is internally threaded to receive the threaded end'portion I9 of an adjusting screw 2I. Screw 2| is rotatably supported in an apertured flange 22, preferably formed integral with base II, and is provided with an enlarged handle 23 whose inner edge abuts against the outer edge of flange 22. A collar 24 is nonrotatably secured to screw 2| and abuts against the inner edge of ange 22. As handle 23 is rotated, collar 24 and the inner edge of handle 23 cooperate with flange 22 to prevent axial movement of screw 2|. But, since screw 2| is in threaded-engagement with lug I8, rotation of handle 23 will cause head I5 to slide along guide surfaces I4. The purpose of this adjustment is to adapt the machine for use in rimming plates of different diameter as will later be explained. Platform I3 and base II are suitably cut away to accommodate lug I8 and the adjusting mechanism above described.

Plate holding chucks formed with vertically extending threaded apertures for receiving the lower ends of parallel rods 21 and 28 respectively. Nuts 29 and 3| are provided upon the lower ends of rods 21 and 23 where they project downwardly from their respective bosses. The upper ends of rods 21 and 28 are similarly threaded and pass through suitable threaded bores formed in vertically disposed bosses 32 and 33 formed at opposite ends of a relatively heavy rigid chuck support 34. Nuts 35 and 36 are provided upon theends of rods 21 and 28 where they extend upwardly from their respective bosses.

Rods 21 and 28 are preferably very rigid and, when nuts 29, 3|, 35 and 36 are tightened. are non-rotatably connected to both head I3 and support 34 so that support 34 is rigidly mounted upon head I3. An arm 35, preferably integral with support 34, extends forwardly from support 34 substantially midway between bosseh 32 and 33 and terminates in a boss 36 having a smooth vertical bore.

A vertical shaft 31 is slidably mounted in the bore of boss 36 and is formed at its lower end with a wide lateral flange 38 from which extends axially a 'bearing portion 39 of reduced cross section terminating in a threaded end portion. An upper chuck member 4I is rotatably supported upon the lower end of shaft 31. Chuck 4| is formed with a hub 42 which is provided with an annular cup-shaped recess 43 at its upper end for receiving a suitable ball bearing assembly 44. Bearing 44 surrounds bearing portion 39 which extends through a suitable aperture in the bottom of cup 43. A suitable nut and washer asembly 45 fitting upon Athe lower threaded end of shaft 31 is positioned within a suitable recess 46 formed at the lower end of hub 42.

Flange 38 and nut and washer assembly 45 cooperate to prevent displacement of chuck 4I axially of shaft 31. Preferably the lower surface of flange 38 and the upper edges of cup 43 are machined to allow relative rotation therebetween. Bearing 44 serves as both a journal and thrust bearing for chuck 4|. Chuck 4I is generally frusto-conical in shape and its lower pie plate engaging surface is preferably smooth although corrugations or other suitable formations may be provided as will later be described.

The upper end of shaft 31 is provided with a shouldered portion of reduced cross-section upon which is non-rotatably secured one end of a link 41. Nut 48 prevents axial movement of link 41 and helps to secure the link rigidly to shaft 31. At its other end link 41 has pivotally secured thereto at 49 a bifurcated link 5I whose other end is connected by a suitable pivot assembly 52 to the forwardly extending end of an arm 53. The other end of arm 53 is provided with a hollow boss 54 fitting non-rotatably and non-slidably upon a cross shaft 55.

Shaft 55 is journaled at its opposite ends in suitable bores formed in upstanding lugs 56 and 51 which are preferably integral with bosses 32 and 33 respectively. Shaft 55 extends beyond 56 and has non-rotatably secured thereto one end of a relatively short arm 60 whose other end is connected by means of a suitable pivot assembly 58 to an adjustable clevis 59 at the upper end of a vertical extending rod 6I.

The lower end of rod 6I- is provided with a bifurcated member 62 which is connected to Van interfltting bifurcated member 63 at the upper end of a treadle operated rod 64 by a suitable pivot assembly 65. The lower end of rod 64 is y aasaeca 'with a gear 98, non-rotatably secured thereto,

provided with a bifurcated member 86 which embraces opposite sides of Va treadle lever 81 intermediate its en'ds and is pivotally secured thereto by a suitable pivot assembly 68. Lever 61 is pivoted at one end upon an upstanding lug formation 69 on pedestal I2. At its other end, a foot receiving portion 1I is provided on lever 61. A coil spring 12 of suitable strength extends between lever 61 and a rigid anchor formation 13 on base I I and tends to urge lever 61 in a clockwise direction (Figure 1) about its pivot at 69 for a purpose to be described later.`

Below the front edge of platform I9, a plate 14 vis rigidly secured to the front surface of base II. Plate 14 is formed with an'integral forwardly and upwardly extending arm 15 which' terminates in a boss 16 having a vertical bore for receiving the threaded shaft 11. The axis of shaft 11 is preferably aligned with the axis of shaft 31 and locking nuts 18 and 18 retain shaft 11 is a desired position of vertical adjustment upon boss 16. The upper end of shaft 11 is provided with an enlarged flange 19 for supporting a suitable bearing assembly disposed in a hub 82 at the bottom of lower chuck member 8|. Hub 82 is preferably of substantially the same construction as hub 42 of the upper chuck so that chuck 8| is freely and rotatably supported upon shaft 11.

Chuck 8| is substantially dish-shaped and is designed to cooperate with upper chuck 4| for retaining a pie plate in operative position in the machine while a rim is being applied to the plate. It will be seen that when treadle lever 61 is depressed as by stepping on foot portion 1| such motion is effective through rods 64 and 6|, arm 60, cross shaft 55, arm 53, link 5|, link i1 and shaft 31 to press upper chuck 6| into the conical recess in lower chuck 8| so that a pie plate placed in chuck 8| will be firmly gripped between the chuck members which are free to rotate together about the axes of their supporting shafts.

Strip bending mechanism A longitudinally extending shaft 83 is rotatand held against axial displacement thereupon as shown in Figure 5. Gear 98 is meshed with an idler gear 99 supported for free rotation upon a suitable support 99' xed to head I5. Idler gear 99 meshes with a gear |00 secured upon a vertically extending shaft |0I which is journaled for free rotation in a suitable bracket |02 rigidly secured to head I5. A collar IIO, non-rotatably secured to the lower end of shaft |0|, and the hub f gear |00 cooperate to prevent axial displacement of shaft I0| in bracket |02. A grooved forming roller |03 is non-rotatably fastened upon the upper end of shaft I 0I. The peripheral shape of this roller and its vfunction will be described later in connection with Figure 8.

Bracket |02 is provided with a laterally extending ear |04 upon which is swlngably mounted, by a suitable pivot assembly at |05, an arm |06 whose free end is formed to support for free rotation a vertically extending shaft |01. At its upper end shaft |01 has non-rotatably secured thereto a suitable forming roller |08 designed to cooperate with roller |03 as will later be described in connection with Figure 8. The hub of roller |08, and an enlarged collar |09 fixed to the lower end of shaft |01 cooperate with arm |06 to prevent axial displacement of shaft |01.

Bracket |02 is formed with a laterally extending integral lug from which projects a stud I I2 to pass loosely through an aligned aperture in a similar lug ||3 formed integral with arm |06. The threaded outer end of stud ||2 is provided with a nut and washer assembly ||4 for retaining a coil spring ||5 which surrounds stud I|2 and extends between assembly I I4 and lug ||3. As seen in Figure 5, spring ||5 urges arm |06 to rotate in a counter-clockwise direction about its pivot so as to urge roller |08 into the grooved peripheryof roller |03 for a purposeV later to be described.

A lower strip curling roller IIB, provided with a strip contacting face ||1 of desired shape, is

ably supported upon head I5. The rear end of Shaft 86 is journalecl upon a pair of spacedv apertured lugs 81 and 88, preferably integral with head I5, and extends laterally beyond lug 88 to receive a grooved pulley 89 which is nonrotatably secured thereto by a suitable fastening means.

Pulley 89 is vertically aligned with a second grooved pulley 9| secured to the shaft of an electric motor 92 whose base is secured to a pair of parallel angle supports 93 and 94. The depending legs of angles 93 and 94 are aper tured-to fit over a pair of rearwardly extending support bars 95 and 96 whose forward ends are rigidly secured to base II. A suitable belt 91 extends between pulleys 9| and 89. The purpose of adjustably mounting motor 92 for sliding movement along bars 95-and 96 is'to maintain belt 91 in proper tension no matter what adjustment of head I5 is effected by rotating handle 23.

non-rotatably secured upon the forward end of shaft 83. An upper strip curlingroller ||8 provided with a strip contacting face |20 is mounted directly above roller I|6 and is non-rotatably secured upon the forward end of a shaft ||9 whose axis extends generally parallel to shaft 83. rollers ||6 and II8 are substantially in contact As shown in Figure l0, the peripheral faces of rollers ||6 and II 8 are substantially in contact Adjacent its forward end, shaft 83 is provided 75 when shafts 83 and ||9 are parallel. Shaft ||9 is rotatably journaled upon a supporting arm |2| which is pivotally secured, by a suitable pivot assembly at |22, to head I5. At its rear end shaft l|9 carries a gear |23 which meshes with a gear |24 fixed to shaft 83 below.

With reference to Figure 13', gears |23 and |24 are constantly engaged but the gear centers are located a few thousandths of an inch further apart than the pitch diameter of the gears. This arrangement has been designed to allow pivotal movement of arm |2| about pivot |22 while the gears are rotating without binding. Pivot |22 is located as close as possible to gear |23 and preferably upon the extended pitch line of that gear to minimize any tendency for the meshed gears to bind during operation. Directly below arm I2I,head I5 is formed with a rigid stop |2| about its pivot |22 in a clockwise direction and thereby separate the curling rollers.

From the above it will be seen that roller I I3 is mounted for movement toward and away from roller ||5 to permit insertion of a plate edge to be rimmed between the rollers. However, in order to insure proper action between gears |23 and |24 during rimming operations, a cam arrangement is provided for insuring that shaft I |9 ls maintained parallel to shaft 83 during that period.

Shaft 83 is provided, adjacent lug 80, with a worm |25 which meshes with a worm gear |23 mounted upon an intermediate portion of a transverse cam shaft |21. Shaft |21 is suitably journaled at opposite ends in a pair of bosses |28 and |29 projecting upwardly from opposite sides of head l5. A cam |3| having a recessed portion v|32 at its periphery is nn-rotatably secured to shaft |21.

Head I5 is formed with an upstanding lug |33 provided with a suitable pivot assembly |34 for supporting a rocker arm |35 intermediate its ends. At one end arm |35 is provided with a freely rotatable roller |36 designed to follow the surface of cam .|3|. At its other end arm |35 is bent laterally to a position above arm I 2| and is there formed with a threaded boss |31 through which exten-ds a stud |33 having a suitable stop formation |39 for engaging a stop formation |4| rigid With support |2I, Stud |38 is maintained in desired positions of vertical adjustment in boss |31 by a nut |42. .This adjustment varies the distance between stop |39 'and member |4| and hence controls -the pressure of roller ||8 upon the rim strip as will later be explained.

A second cam |43 (see Figure 5) is non-rotatably secured to shaft |21 and is provided with a peripheral recess |44. A suitable arm |45 is pivotally mounted upon head I5 at |45 and is pivotally secured to the pivot assembly 65 within the arms of bifurcated member A|53. Arm |45 is formed with a laterally extending integral port-ion |41 which carries a freely rotatable roller |48 designed to follow the surface of cam |43.

Arm |45 is further provided with an abutment I 45 adapted to engage a lever |50 fixed upon one end of a latch control rock shaft |19 which is journaled, by some suitable means (not shown). on head I5. Lever |50 is constantly urged in a clockwise direction (Figure 4) by a spring |8| which extends between the free end of lever |50 and a stop formation |50 rigid with head I5 for a purpose later to be described.

With reference to Figure 11, the preferred form of curling rollers ||6 and ||8 is there illustrated. The metal rim contacting faces of the curling rollers comprise .substantially semi-cylindrical grooves ||1 and |20, respectively, on the roller peripheries and these grooves cooperate to form a substantially circular pass in which the strip is progressively curled about the plate edge as will later be described. Rollers ||8 and ||8 are provided with relatively narrow end flanges ||5 and 8', respectively, between which the plate to be rimmed is gripped as indicated in Figure and as will later be described. The plate gripping peripheries of flanges ||5 and H8 are spaced to accommodate the material of the plate being rimmed.

Strip guide mechanism and |53 upon a rigid bar |54 extending laterally from the base Il of the machine. Preferably, this material'is slightly preformed, as shown in Figure 8, before insertion in the apparatus of the invention. One wall of bin |5| (see Figure 4) is bent generally downwardly for the major portion of its depth to form a substantially V-shaped trough |55 to which the strips of metal are manually transferred from bin |5| as desired. Trough |55 extends substantially tangentially to rollers |03 and |08 at their contacting edges.

A collar |56 is rigidly secured to treadle rod 64. A link |51 is pivotally conn'ected at one end to collar |56 and is pivotally connected at its other end' to one end of an arm |58 rigid with a cross shaft |59 suitably journaled in arm |53. An upwardly extending arm |8|, rigid with shaft |59, has its free end pivotally connected to the inner end of a slidable bar |52 which is supported for movement substantially parallel to trough |55 in a hollow boss I 83 integral with arm |52. At its outer end, bar |82 carries a strip pushing member |54 which can be locked in any desired position of adjustment along bar |52 by asuitable clamping means at |65.

When treadle lever 51 is depressed, motion is transmitted through link |51, arm |58, shaft |59, arm |5| and bar |62 to force member |54 into engagement with the projecting end of a metal strip in trough |55. In this manner the metal strip is pushed into the apparatus and positive and timed feeding of strips into the machine is assured.

One revolution clutch With reference to Figures 4-7, inclusive, worm gear |26 is mounted upon shaft |21 in such a manner that it is freely rotatable thereupon but is maintained against axial displacement therealong. A clutch member I 65 is non-rotatably secured upon shaft |21 by means of a pin |51 which extends diametrically through the shaft and clutch member. Clutch member I 56 is provided with a bore |68 extending generally parallel to shaft |21 and slidably receiving a clutch pin |59. Pin |59 is provided with a radially extending stop 1| which extends through a slot |10 and abuts against the outer end of a coil spring |12 disposed in aI recess |13 in clutch member |65. Spring |12 urges pin |59 toward gear |25 which is provided with a plurality of internal sockets |14 for receiving the inner end of pin |69 to lock .the gear and clutch element to rotate together at predetermined period.

At one side pin |69 is provided with a groove |15 having an inclined surface at |16. 'I'he disposition of stop |1| in slot |10 keeps Din |59 from rotating in bore |68. Clutch member |66 ris formed with a peripheral groove |11 which A passes through boreJ 58.

With-'reference to Figures 2,'4 and 5 the strips |5| which is rigidly supported by spaced legs |52 75 8| to remove the latch from groove |15.

A latch 18 is non-rotatably secured to'rock shaft |19 and its free end is urged into groove |11 by the pressure of spring |8| against lever |50 (see Figure 4). Latch |18 is of such width that it rides in groove 11 at all times and at predetermined intervals may be forced into the pin groove |15 to remove pin |59 from socket |14. To this end latch |18 is formed with an inclined portion |19' for cooperating with inclined surface |16 on pin |59.

In Figure 7 the parts are illustrated in the position they assume just after clutch latch |18 has been moved against the tension of spring moval of latch |18 permits spring |13 to force pin |69 inwardly into the first available socket |14 of -constantly moving gear |26 so that gear |26 and shaft |21 are locked together for simultaneous rotation. After being removed from groove |15 for a period of time sufficient to allow insertion of pin |68 in socket |14 as above described, latch |18 is released and is forced by spring |8| against the inner surface of groove |11. After a single revolution of clutch member |66, the inclined surfaces at |16 and |19" cooperate under the urge of spring |8| to force pin |69 to the right in Figure 7 and thus break the driving connection between gear |26 and shaft |21 for a purpose to be described later.

Operation In operation, shaft 86 is continuously driven by means of its belt and pulley arrangement with motor 92, and worm 85 and worm gear 84 cooperate to continuously rotate shaft 83 and the forming and curling rollers geared thereto. A preformed paper plate P is placed in chuck 8| -with its flanged rim extending beyond the peto cause upper chuck 4| to descend and securely clamp plate P in lower chuck 8|. Depression of the treadle lever also trips latch |18 through the medium. of arm |45, abutment |45', lever |50 and rock shaft |19 to permit gear |26 to drive shaft |21 for a complete revolution. Actuation of arm |85 by the treadle also removes roller |48.from cam recess |44. Proper entry of strip S between forming rollers |03, |08 is insured by the action of member |64 which is actuated by the slidable movement of bar |62 to engage the projecting end of a strip in trough |55 and push it into the space between the forming rollers.

Rollers |03 and |08 are formed as shown in Figure 9 to further bend the strip S to a proper predetermined form before it is advanced to the curling rollers H6, H8. Strip S is bent into the form shown in Figure 9 and at the same time is fed toward the curling rollers due to friction between the strip and forming rollers and since roller |08 is constantly urgegl into engagement with the strip by spring H5.

After leaving the forming rollers, strip S is advanced between rollers H6 and H8 so that its opposite edges are engaged by the opposed strip contacting and beading faces and H1. As explained above faces |20 and H1 are so shaped that, Aupon rotation of rollers H6 and H8, strip S is curled or beaded about the rim of plate P as shown in Figure 10. As shown in Figure 10, the above described curling action forces the opposite lateral relatively sharp cornered edges of the metal strip deeply into the relatively soft material of plate P so that strip S is securely locked in biting engagement with plate P.

The above described strip curling and crimping action not only fastens the strip to the plate but, by reason of the tight frictional engagement of rollers H6 and H8 with strip S and the gripping action of iianges HB and H8', causes rotation of the entire chuck unit about its tall bearing supports so that strip S is progressively secured along the entire peripheral edge of plate P.

The length of strip S may be predetermined as equal to the circumference of the edge to be rimmed. However, it is'preferable to make strip S of a length slightly greater than vthe plate rim circumference 'so that the opposite ends ofy the crimped strip will cooperate to form a tightfoverlapping lock joint J of the type illustrated in l Figure 10A.

Curling shoe-4 assembly After the strip has been locked onto the flange of the receptacle by the rolls H6 and H8, it is acted upon by a curling shoe assembly which performs two definite operations upon the strip. First, it effects a final clinching of the strip o n the plate and secondly, it smoothly curls the strip so as'to make it conform accurately to the shape of the plate.

The curling shoe is designatedas |82, and it is seen more clearly in Figures 2, 2A, 2B, 2C and 5. Shoe |82 is provided with a tapered portion |83 which extends into the space between rollers H6 and H8 at the point where the strip leaves them, and itis secured to any suitable stationary part of the machine (not shown) by cap screws Shoe |82 is provided with a curved face |85, which conforms to the curvature of the periphery of mandrel 8|, and groove |86 is provided therein. The latter is provided with comparatively shallow leading and trailing ends |81 and |88, respectively. Groove |86 is of a width somewhat less than that of the strip material after it has been applied to the rim and emerges from. rollers H6 and H8, with the result that as the A rim-carrying plate flange is forced through the groove, the rim will be firmly and nally clenched into biting engagement with the flange of the plate. Also, by reason of the curvature of the groove,'the strip will be smoothly brought to the Modifications In Figure 12 is illustrated'a curling roller arrangement which may be used in place of that at Figure 11. Here rollers |9| and |92 are of different diameter and the smaller roller |92 is formed with an enlarged portion which is grooved at |93 and provided with a narrow end flange |94. The larger roller |9| is formed with a reduced portion which is grooved at |95 and provided with a narrow end ange |96 and is adapted to cooperate with roller |92 to curl a strip of metal about the edge of a paper plate in the same manner as the rollers of Figure 11. Flanges |94 and |95 are spaced slightly to allow for the thickness of the plate material gripped thereby.

The arrangement of Figure 12 is especially advantageous where the paper plates have flanges of small width since the outer lateral face of the larger roller limits the degree of insertion of the plate ange between the rollers.

'I'he stationary forming die |91 illustrated in Figures 14-1'1 may be used in place of the forming rollers of Figure 9 with the strip material being advanced therethrough by any suitable means such as a friction couple. Die |91 is provided with a tapered forming groove |98 and a cooperating removable shoe |99, and as the strip is advanced from left'to right in Figure 14 it is preformed to a shape suitable for feeding into the pass between the curling rollers.

The one revolution clutch unit illustrated in Figure' 18 .embodies a modified latch arrangement wherein the above described clutch unit |66 having a peripheral groove |11 is employed. A bracket secured to head 5 by rivets, bolts or the like through holes 202 is provided with a vertical hollow boss 203 in which is slidably disposed a latch element 204. The upper end shoe 205 of element 204 is arcuate in shape and 'suitably formed for cooperating with clutch pin |69 in the same manner as latch |18 above described. The lower extension 206 of element 204 is of reduced cross-section and passes through an apertured stop plate 201 secured in the threaded lower end of boss 203. A compressed coil spring 208 surrounds extension 206 and extends between plate 201 and the enlarged portion of latch element 204.

A link 209, secured pivotally to the lower end of extension 206 is ad-apted to connect the latch element with an operating member such as the arm |45 or some other arm connected to the foot treadle. In operation, a downward pull on link 209 will separate shoe 205 from pin |69 and cause engagement of the clutch in the manner described above. Release of the force pulling downwardly upon link 209 will permit spring 208 to urge shoe 205 into cooperative engagement with pin |69 at the completion of a revolution of. the clutch shaft.

llate forming and rimming machine 2|3 by meansof which itis slidably supported in a guide 2 I4. A suitable treadle mechanism, similar to that above described', may be used for lowering chuck 2|| into chuck 2| 2 during the plate forming operation. Chuck 2|| is provided with a bottom recess 2|5 for receiving a kicker plate 2 I6 secured to the threaded end of avplunger element 2|1 which extends through an aperand away from the chuck to the fully extended' position of Figure 19. Head 2|8 limitssuch movement of plate 2|6.

Similarly, bottom chuck 2|2 is formed with an internal recess 224 for receiving a kicker plate 225 'secured to the threaded end of a plunger 226 which passes through an aperture in chuck 2|2 and terminates in an enlarged head portion 221 disposed in recess 228 in chuck 2|2. Plate 225 and chuck 2|2 are provided with a plurality of surface recesses 229 and 23| respectively between which extend springs 232 tending to urge plate 225 out of recess 224 and away from the chuck 2|2. Head 221 limits such spring urged movement of the plate 225.

Each of chucks 2I| and 2|2 is suitably mounted for free rotation upon its support much in the manner shown for chucks 4| and 8| above described. However, in this embodiment of the invention a suitable automatically releasable clutch means (not shown, but which may be of any desired construction) is provided for holding chucks 2|| and 2|2 non-rotatable during .the plate forming operation as will later be deture in chuck 2|| to terminate in an enlarged head portion 2| 8 disposed in a recess 2|9 within chuck 2| y Plate 2|6 and chuck 2|| are provided with a plurality of cooperating surface recesses 22| and scribed.

A pair of cooperating strip curling rollers 238 and 234 are mounted upon a movable portion of the machine so that they may be advanced between the chucks to embrace the rim of the plate Vpositiied laterally of the chucks so as not to interfere with the forming operation. The treadle is actuated thereby causing chuck members 2|| and 2|2 to clamp the sheet therebetween and Aform the sheet into a plate or container of desired shape. During this forming operation chucks 2|| and 2|2 are held non-rotatable with respect to the material T and plates 2|6 and 225 are forced to seat flush into recesses 2|6 and 224 respectively and engage opposite sides of the formed plate to provide smooth die surfaces on the chucks.

After the plate has been formed, the automatic clutch mechanism is tripped to render both chucks rotatable freely about their axes and move chuck 2|| upwardly a predetermined distance in guide 2 I4. When the upward movement of chuck 2|| is checked the formed plate will be held between the kicker plates.

At the same time, the movable support for the curling rollers is advanced automatically t em'- brace the anged periphery of the formed plate as shown in Figure 20, and a vreeni'orcing metal strip is secured to the edge of the freely and rotatably supported formed plate. This rimming operation is substantially the same as described above in connection with Figures 1-13.

After the rim is applied the automatic chuck clutch is further actuated to separate the chucks until the reenforced formed plate rests entirely upon kicker plate 225'. At the same time the curling rollers are automatically separated to reto proper position by rotating handle 23.

lease the formed `plate and are moved from between the chucks so that the rimmed formed plate may be easily removed manually'and the operations repeated.

During the above described rimming operation, shaft ||9is maintained substantially parallel to shaft 83 and roller ||8 is caused to exert a substantial pressure upon the lateral edge of strip S by the action of rocker arm |35 .whose follower |36 mounts to the high portion of cam |3| as soon as shaft |21 begins to rotate and during the period the strip is being fastened to the plate.

At the end of a complete revolution of shaft |21, rollerl |48 drops back into the cam recess |44 from whichit was removed by depression of the foot treadle and spring |8| causes latch |18 to withdraw the clutch pin |69 thereby disengaging shaft |21 from its drive until the treadle is again depressed. Movement of roller |48 into the cam recess |44 also locks shaft |21 against overrunning and simultaneously permits spring |12 to positively actuate the chuck control rod 6| to separate the chuck members. At the same time, follower roller |36 falls into recess |32 oncam |3| thereby relieving the pressure of rocker arm |135 on arm |2| and permitting spring |30 to cause separation of the curling rollers. The completely rimmed plate can then be removed manually, a new plateA substituted in chuck 8| and the above operations repeated.

The above described machine may be adapted for use in applying rims to different sizes of pie plates. mit the machine to be operative upon plates having diameter varying from four to nine inches. For plates of different size, suitably sized chuck members are mounted at 4| and 8|, cams of proper size are mounted on shaft |21 and the mechanism of head I is advanced or retarded Motor 92 is then shifted to tighten belt 91.

The cams on shaft |21, the chuck members 4| and 8| and the curling rollers are/all mounted in such a manner as to be replaced by similar parts of different size, or design as the nature of the work to be performed demands. In each case the arrangement is set up to completely rim a plate in chuck 8| each time shaft |21 makes a complete revolution.

Furthermore, strip S need not be prebent or precut before entering the machine since it is well withinthe spirit of the invention to provide the machine with means for feeding at strip material from a coil, cutting it to proper size and bending it as desired all in automatic sequence. It is further Within the spirit of the invention to insert properly preformed metal strips directly into the pass between the curling rollers, thereby eliminating the forming step of Figure 9.

Advantages The adjustments illustrated above perto get the proper rigidity and suflicient space for fastening the metal to the paper plate. The beaded rim of my invention uses a 'relatively narrow strip of metal, about one-half the widthV of that used in the prior art, and after being curled in generally circular cross-section is especially effective to resist bending stresses at the plate rim. l

The plate may be formed of paper, paper board or any similar brous material and may comprise laminated material made up of sheets of paper and metal foil adhesively secured in full surface engagement. The reenforcing rim strip is preferably of metal but may be made of any, bendable material capable of maintaining a givl vembodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claimsV are therefore intended to be embraced therein.

What is claimed and desired to be secured by United States Letters Patent is:

1. Apparatus for applying a stiiening rim to the periphery of a generally circular article formed mainly of fibrous material, comprising means supporting said article for free rotation with a peripheral edge thereof adjacent a rim securing station, means for advancing a substantially straight preformed metal strip into `said station, said strip travelling substantially tangentially to said article edge when it reaches said station, means at said station for bending said strip about said article edge in such a manner that opposite lateral edgesof said strip are pressed into intimate locking relation with the 'u `material of the article wall at opposite sides thereof at said edge and said strip is caused to assume the same curvature as the periphery of said article, said last-named means also being operable to synchronously rotate said article and advance said strip through said station, whereby said strip is progressively fastened along the peripheral edge of said article.

2. Apparatus for applying a stiifening rim upon a generally circular member, comprising means supporting said member for free rotation with said member, and simultaneously bending said' strip longitudinally of its length so as to conform substantially to the periphery of said member, said means also being operable to rotate said member and advance said strip through said station so that said strip is progressively fastened along the peripheral edge of said member.

3. In an apparatus for applying a stiifening rim to the peripheral edge of a member, a pair of rolls mounted for rotation in closely adjacent cooperating relationship with each other to define a strip-bending pass; means mounting said member for rotation adjacent said rolls so that upon rotation thereof its peripheral edge will be constantly maintained in said strip-bending pass; means for feeding a narrow strip of metal endwise into said bending rolls substantially tangentially with respect to the peripheral edge of said member; means for rotating said bending rolls for causing said strip to be simultaneously curved longitudinally around the peripheral edge of said member and bent transversely of its length into biting engagement with opposite sides of the latter; and a stationary curling shoe located beyond said bending rolls and conforming to the curvature of the periphery of said member and frictionally cooperating with said strip for insuring that the latter will accurately conform to the shape of the peripheral edge of said member.

4. In an apparatus for applying a stiffening rim to the peripheral edge of a member, a pair of rolls mounted for rotation in closely adjacent cooperating relationship with each other to deflnea strip-bending pass; means mounting said member for rotation adjacent said rolls so that upon rotation thereof its peripheral edge will be constantly maintained in said strip-bending pass; means for feeding a narrow strip of metal endwise into said bending rolls substantially tangentially with respect to the peripheral edge of said member; means for rotating said bending rolls for causing said strip to be simultaneously curved longitudinally around the peripheral edge of said member and bent transversely of its length into biting engagement with opposite sides of the latter; and a stationary secondary bending shoe supported adjacent said rolls and having a groove therein located in the plane of the peripheral edge of said member, said groove being of a size to exert a final crimping action upon said strip as the latter is propelled therethrough by said bending rolls and subsequent to bending of saidl strip in said pass.

5. In an apparatus for applying a stiening rim to the peripheral edge of a member, a pair of bending rolls mounted for rotation about spaced substantially parallel axes and adapted to be moved relatively toward and away from each other; a mandrel mounted for rotation adjacent said rolls and adapted to support said member with its peripheral edge adjacent said rolls; a rotatable clamping element adapted to frictionally grip said memberbetween it and said mandrel; and means for moving said rolls toward each other and also substantially simultaneously moving said clamping element toward said mandrel.

6. In an apparatus for applying a stiifening rim to the peripheral edge of a member, a pair of bending rolls mounted for rotation about spaced substantially parallel axes and adapted to be moved relatively toward and away from each other; a mandrel mounted for rotation adjacent said rolls and adapted to support said rolls; a rotatable clamping element adapted to frictionally grip said member between it and said mandrel; means for holding a piece of partially formed run material in position adjacent said bending rolls; and means for moving said rolls toward each other and also moving said clamping element toward said mandrel, said last-named means also being operable to substantially simultaneously feed said material into said bending rolls.

7. In an apparatus for applying a stiiening rim to the peripheral edge of a member, a pair of bending vrolls mounted for rotation about spaced substantially parallel axes and adapted to be moved relatively toward and away from each other; a mandrel mounted for rotation adjacent said rolls and adapted to support said member with its peripheral edge adjacent said rolls; a rotatable clamping element adapted to frictionally grip said member between it and said mandrel; a rotatable shaft; power means for rotating said shaft and said bending rolls; a clutch mechanism driven by said shaft and having operative connection with said rolls for bringing them together when said clutch mechanism is actuated; and common means for substantially simultaneously actuating said clutch mechanism and moving said clamping element toward said mandrel.

, 8. In combination, a pair of rolls mounted for rotation about generally parallel axes and adapted to cooperate with opposite sides of the edge of a member for securing a reenforcing strip thereto, said rolls each having a circumferential groove of substantially semi-circular shape in cross-section and cooperating with each other to denne a bending pass of substantially circular shape; means mounting said member with its edge for travelling movement through said pass; means for feeding a substantially straight strip of metal endwise into said pass adjacent said member, said strlp of metal being of such width that when it is transversely bent into substantially circular shape in cross-section it will substantially fill and conform to said circular pass, and the lateral edges of said strip will be brought into tight engagement with surfaces of said article adjacent its edge, and means for rotating said rolls to bend said strip and force its side edges into engagement with the edge of said member, said rolls being operable to confine said strip against movement in any direction other than in thedirection of its length.

9. In an apparatus for applying a stiffening rim to the peripheral edge of an article of generally circular shape, a rotatable support for said article; means for releasably maintaining said article in place on said support; means for feeding a relatively narrow strip of metal endwise to a rim securing station located adjacent said support, a portion of the peripheral edge of the arti-l cle on said support extending within said station adjacent said strip; means at said station for simultaneously rotating said article and support and maintainimr, said strip in predetermined relationship to the edge of said article and progressively bending said strip laterally and fastening it along the edge of said rotating article, said lastnamed means also cooperating with' said support for causing said strip to be bent circumferentially around said article,` and comprisingfa pair of strip curling rolls at said station for engaging and bending said strip about said article edge; means for urging one of said rolls towards the member with its peripheral edge adjacent said other while said rim is being applied; and means for automatically effecting separation of said rolls after the rim has been applied.

10. In an apparatus for applying a stiffening rim to the peripheral edge of an article having a substantially circular edge, a pair of strip curling rollsv each having a circumferential groove of semi-circular shape in cross-section; means mounting said rolls for rotation aboutsubstanarticle; and means for rotatingsaid rolls for causing said strip to be transverselybent tially parallel axes with their grooves disposed inclosely adjacent cooperating relationship with each other to 'denea substantially circular stripbending pass; a support Vfor said article located adjacent said rolls; means mounting said support for rotation about a iixed axis so located thatupon rotation thereof,l with an -article in place thereon, the peripheral edge oi said article will be constantly maintained in bisecting relationy ship to said .circular strip-bending pass between said rolls; means for feeding a substantially straight, narrow strip of metal of predetermined length into said bending rolls substantially tan- -gentially with respect to the circular edge of said rotation of said rolls will simultaneously cause said strip to be progressively brought into cony formity withthe circular edge'of said article, and

said istrip .being longer than the circumference of said article.v whereby upon completion o! a substantially iull revolution of said support the ends oi' said strip willbe voverlapped and frictionally interlocked.

yALLEN B. WILSON.

EDWIN` v. SWANGREN. 

